Response Modal Nonlinear Time-History Dynamic Analyses of the Northridge Earthquake of a Two- Storied Steel Structure with Rubber Isolator and Fixed-base Systems

This paper analyzes and compares the responses of a two-storied steel structure to 1994 Northridge earthquake in California. Response modal nonlinear time-history dynamic analysis was especially used on with fixed-base base-isolated systems show realistic behavior structure. Intuitively, best choice for seismic isolation technique is use flexible element, or an isolator, at structure’s base, which ensures damping. The current research analyzed depth application base isolator In this study, one different support investigate isolation. compared features performance without building subjected earthquake-induced load rubber bearing. modeled by SAP2000 analysis. Ground-motion simulations M6.69 California were applied model. Study results showed that presence system 24 feet (7.31 m) height increased time period significantly due reduced resonance throughout building.